I saw some videos on youtube that have enough evidence for me to believe this. I know nothing of gas powered stuff, but for those that do, here's a youtube video of what I saw. More quick searches will yield other results as well.

I've heard that metal screening material works good as a spark arrestor but have not been able to test it out. There are also other spark arresting methods for vapor carb setup. I have no small engine to test with so have not bothered with tests. I know from watching the troubles others have that running an engine where the RPMs can change a lot can be problematic but doable. A generator engine would be great for testing.

Some issues I've heard about with gas vaporization: the engine runs lean (the point?) and can run hotter and possibly overheat in some cases (probably depends on design). Getting the air to fuel mixture just right can be tricky. Risk of fire and explosion if some form of flame/spark arrestor is not used and other precautions taken.

One very interesting video I came across awhile back was about a guy running his push mower on gas vapor. His setup was super simple. Tube going into a big pickle jar with some gas in the bottom and another tube going out and to a valve then to the carb (with an air inlet in the line between the jar and carb but can't remember specifically where but it had a valve on it too). The point of his video was that the gas did not need to be bubbled as many people do it. It seemed to work, but he probably should have had something in place to prevent a backfire turning into a bad day.

Another method of spark arresting I've heard about but not invested too much is basically a container packed full of steel scouring pads placed near where the line enters the carb.

If anyone has experience with gas vaporization, I would love to hear it. Especially if it involves a vehicle (due to changing RPMs and loads).

EDIT: Forgot to mention that gas vapor is only a fire/explosion hazard if the air mixture is within a certain range. Also might be a good idea to put a spark/flame arrestor on the air inlet to the fuel container. The above is mostly about cold gas vaporization. There is also people talking about full vaporization of gasoline so that nothing is wasted. When doing the cold method, you will eventually be left with some unusable liquid in the fuel container. With the full vaporization (using heat to heat the gas to a certain temperature in a controlled manner), it will leave little to nothing in the fuel container.